Machine for fastening with wire staples



Oct. 4, 1932. F. MERZ ET AL MACHINE FOR FASTENING WITH WIRE STAPLES Filed Feb. 27. 19:50 2 sheets-Sheet 1 F. MERZ ET AL MACHINE FOR FASTENING WITH WIRE STAPLES 2 sheets-sheet 2 Filed Feb. 27. 1930 null :g LA l Patented Oct. 4, 1932 entren sfr Afr ss PATENT FF'ICE u FRITzzMERz, .annialiens Farr-z;serieuse,v oF FRANKFoar-oN-TiIE-MAIN-Ronnnnnnvr; GERMANY MACHINE FASEENING WITH" WIRE STAPLES A Application filed February 27, 1930, Serial No; 431,861, and'in Germany-June 4,1928.

The" invention relates' to a..handn stapling machine for fasteningjpapers an'dthe'like by means of wire staples.` Ai reelof wireV inserted in the 'machine' contains the" wire forV g forming the'staples'. When the'machine'is round the material-to beastened.

j' The invention willibe" clearly' understoodv from the followingdescri'ption aidedfby theV annexed drawings in which a typical embodiment of the new'staplingmachineis illustrated; Y.

Fig. .l is alongitudinal section 'through `the machine.

j Fig; 2 is aplanof same with the outercover or" the tool chamber. detached:l A Figs. 3 to"6'rep`resent asection'alongithe line of" Fig.' 2," with the several parts in their various positions duringtheI course-lof the operation.` l j Y j Fi gs. 3a to 5a 'show thepositi ons oflthe'sev'- eral parts correspondingl to those in `Figures 3 to '5, ina section"a`lng'tlie' line'gw-Saoff Fig. 2; t

j* Fig.. `is aperspectiveview offthe' members which shape and drive the staples. A

Fig. Slis a part ofthat j aw' ofthe'machine' which yserves asanvilf. j Fig. 9 is a liorizontalsection,through'thechamber I) above'the 'guideforothe wire;

As can be seen f'romFigur'es 1 and 2, the open ends of the mouth of the new machine accordingfto' the invention are bent atan angle infrelation to theplanel of the machine tor theV purpose offen'abling the machine to be moved v alongl theV fastening margin! and the Y marginvof'papersor the like; of any conveni# ent dimensions,v to beguidedthrough the machine and .stapledfy (Figure-2)'. VThe upper limb a is forked inf-front` and rear ofthe pivotal axis c and carries on its free end-the anvil or plate-a1' (Figure 8)servi ng asa-sup port for the material to berfastened and for thestaples.' The other limb which carries the tools for forming the Ystaples, -consists of two parts whch also are forkedatthe pivotal axis 0. The member bcontaining -the tools forms a chamber which is pivotally mounted in' thev forkcdportion of the limb a and to# gether with the handle d is secured on' the' pivot c by means oftbearing lugs b1; An arm b2 provided on the casingy b and projecting rearwardly between the limbs carries the 1 The rearwardly extending arm b2 is forked at'the ends to accommodate the reel@ 'orfwire and each'pportion is provided with slots'or the like e2, inwhich the axis' of thereel` is inserted. A forked pawle.1 mounted' atV b3 on the arm b2 bears againstthevaxis ofthe' l reelby means et its forked.l ends under the action of a' spring and holds same' in the slo-ts e2, A coiled spring f, disposedbetween the arm s'and the handled holds the parts of the machine in the position vof engagement shown in Figure 4,`in which the arms/of the limb d bear at w against the cover 57 ofthe casing (Figure l). A weaker spring freni gages at one end onthe' lever d and at4 the other" end with the lirnb` a,' which'it causes to bear atV y against the casing b or the rear part of the cover7 thus determiningthe' opening of the jaws. Y

The staples are formed in the ehamberb', which is divided by a partition into the chamber b4 situated in thebent portion and a larger portion. in ythe forwardly vsituated smaller chamber space Zita-re slidablydis posed (see FigurevQ) the staple formers 'g1 and g2 together with the driver h1 (Figure 7).' The driver'consists of a driving platel tl oi" the same width as the staples and the formers g1" andfgz are disposed on either side, near the driver. In order to enable both parts to undergo relative displacement,y twok sliding'members g and h' are disposed .face to face inthe casing ofthe cham-ber (Figures 3av to 5a)V at' a distance correspond# ing tothe thickness of the former and rdriver plates. The member g carries the externally v disposed' former plates g1 and gand the member h carries the driver h1. The members g1 and g2 are chamfered and as hereinafter described, the one plate can serve as a cutter. Zhen the two sliding members are superimposed the driver h1 lies between the members g1 and g2. The sliding members are preferably inserted in a frame'gs, the under portion of which is provided witha feed channel for the binding wireV J'. The sliding members g and 7L are'provided with an opening or are designed in such a way that each of the rocking levers e and j is adapted to engage one of said members through the partition. The rocking levers depress the sliding members with the parts g1, g2 and 71.1 in such al way that the sliding member g with the plates g1` and g2 moves ahead, so that they can detach a length of wire and bend the `ends. of same into a staple over an abutment Z (Figure 4). Y

:Theheads l and jl o-f the levers z' and y' each project through a slot in the partition into the sliding membersg and It respectively. The wire his fed from thereel by a. device to be described later, into the. discharge opening b5 of the chamber b4 (Figures 3, 3a and 9) into which opening projects the abutment Z, which is secured on the casing b by means of a flat'spring VZ1 -or the vlike and can be moved out of the way of the wire feed device.

lThe manner in which the machine. operates in shaping the rstaples canbe seenfrom Figures 3 to G and the corresponding Figures 3a to 5a. At the beginning of the operation the machine or its parts -occupy the Y position shown ,in'Figures 3 and 3a. When fio the limbs of the machine are caused to converge the movement is transmitted through the arms Z1 and (Z2, which act on the levers i and j, to the sliding memberg and staple driver in the manner hereinafter described, so that at first, only the member g is advanced. Inthis advancing movement ofthe former, the plate g2 cuts 0H a piece of Wire of the length of the staple to be formed. This wire is then bent round the abutment Z into a U staple by the chamfered plates g1 and g2 during their further advance, the position being shown in Figures 4 and 4.a,V

y During the further convergence of the machine, the staple driver 71,1 n-ow advances, whereas the formersV g1 and g2 remain stationary. The plate h of the driver h1 carries a'pin h2, the point of which is chamfered or wedge shapedVa-nd which projects out of oblique end surface on the edge of the hole and moves the abutment Z away from the opening Z5 (Figures 5 and 5a) In the mean-k time the driver plate h1 is moved forward simultaneously with the pin h2 (being mounted on the same sliding member 7L) and during its descent forces the` staple out of the opening Z5 and through the underlying material which is to be fastened. When the machine is in the fully closed position the tips of the staple encounter the anvil a1 or the recesses a2 and are bent over as lshown in Figure 6.

VAs already mentioned, the movement of the staple former and driver during the closing ofthe machine is efl'ectedby the limbs 0Z1 and Z2 of the handle cZ. For the purpose of transmitting the movement, the levers z' and are mounted on a pivot inthe casing b. The fiat round heads l and jl of these levers `Aengage in theV sliding member g Vand L. The

in the member gis swung out first and is followed after a certain stroke, by the sliding member which carries they driver h1. The curvature of the limb Z1 is such that the lever z' ceases to swing as soon as the swinging movement of the lever 'y' coupled .with the driver 7L commences. vThis can be easily seen from Figure l.

The levers 'il and j are returned into neutral position by means of spiral spring 2, j? mounted on the `casing atb6 and acting on said levers. The arms .7'3 and 3 projecting through slots in the casing serve for the eX-V amination and actuation of the levers by hand in the event of seizing or the like.

The wire is fed forward intermittently with the opening and closing of the machine and the movement of the tools for forming the staples and the feeding is timed so that in openingthe jaws of the machine, a suiicient length of wire to form a staple is moved into position under the tools. For `this reason the feed device is connected with one of the levers for actuating the tools, namely the lever z' in the embodiment described. The

rjl

wire 7c coming from the reel is led through guide tubes o, p and g (the latter being tapered) into the gap b5. The central member. p Aof. the tubes is adapted to slide over the tube o and inside the tube g, or vice versa. A flat spring o1 in the tubev o is intended to prevent the wire from slipping back when once in position. As can be seen from Figure 9, the wire guide is disposed on one side of the chamber b and in the direction of the compartments Vof the chamber b, thus enabling the front end of the wire to be introduced for the purpose of forming the staple intothe middle of the guide?) by delecting i the guidance of the wire without interfering with the actuation ofthe tool. Hence the wire reel can be disposed directly in the plane of the Vascending and descending members and the wire fed in their direction, :whilst the gan staple formed from the wire is set in =a :di-

verted plane by the tools.

ing its forward movement the clamping lever rises, holding the wire against the :tube y) and carrying them both with it. The advance and retreat of the tube P and pawl 7- engaged by the drawbar s are effected by the lever z'. F or this purpose there is mounted in the casing Z) in front of the pivotal axis of the levers e' and y', a spring controlled lever n which is mounted on the pivotal Yaxis nl and carries on its downward arm the :drawbar s. A spiral spring on the axis nl tends to turn the lever u and with the aid ofthe bar s to maintain the powl 1 and tube p in the forward position. Pivotally mounted in front of the axis nl is a two-armed lever m, the one arm of which engages under a nose n2 on the lever n and is guided by means of a pin m2 on the other arm in a slot m1 in the lever e'. It will be evident that in descending, the front end of the lever el or 1, the pin m2 is also moved and swingingfout the lever m causes the nose n2 to turn the lever n, so that the bar s and tube p are pushed `against the action vof the spring disposed on the axis,

fnl. In this movement the cam of the lever of slides over the wire 7c. As soon, however, as the lever z' swings back again, its rear arm moves away from the nose n2 and the lever fa is able under the influence of its spring, tov exert a pull on the bar e and pawl 1, whic-h clam-ping the wire, draws the latter and tube p as far as the stop, thus feeding -aportion of wire of the `length of a staple lunder lthe tools. This operation is repeated `each 'time the tools allow access over 'the anvile or in the gap '65.

The method of operation will be evident i from the description, when the papers to be fastened are inserted in the jaws of the machine, the latter is closed by squeezing the handles. This causes the levers i andy' to move and insert the staples in the manner described. The movement of the lever 'z' causes the lever `m and n positively connected therewith to describe an anticlocfkwise movement. The movement of the lever fn, is transmitted by the bar s to the cam lever 7' and tube p. During the subsequent opening of the machine, the wire is 'fed forward. Since, in the meantime, the discharge opening has been freed by the ejection of the preformed staples, the wire is free to enter said opening and the machine is then ready for the next working operation.

We claim:

l. A hand stapler of the .plier type in which `staples `are automatically detached and formed, when the jaws of the plierslare closed, acasing pivotally mounted on the pivot of the jaw members and carrying staple forming and setting members, said casing `carry- :ing a wire reel, one of the jaws being forked at its free end to form operating cams, and levers'operated' by the said cams for actuating the staple forming and :setting members.

'2. A handstaplery of thepli'er type in which .staples are automaticallyV detached and formed when the jaws of the pliers are closed, a `casing pivotally mounted on the pivot of the jaw membersy and carrying staple forming and setting plungers, said casing having a wire reel on its rear end, one of the jaws being forkedat itsfree end to form operating cams, and levers operated by said cams for actuating the staple forming and setting plungers. y

3. -A hand stapler of the plier 'type in which Vstaples are yautomatically .detached vand formed whenthejaws of the pliers are closed, ya casing pivotally mounted on the pivot of `the jaw members and carryingstaple forming-and setting tools, the ends of the mouth of lthe machine being bent atan angle and the forming of the staples being effected in 4this bent portion, one half of the mouth of the machineforming the casing in which are y'combined the staple forming and staple driving tools, vthe discharge opening vof the chamber housing the' staple former being provided with a recess `in which 'an abutment surface which projects'into the said opening fand serves to form the staples, is forced back by the driver during its descent. e

4. Ahan'd stapler of the plier type in which staples are automatically detached and formed when the jaws ofthe pliers are closed, a Icasing pivotally mounted on the pivot of the jaw members and carrying staple forming and setting tools, the ends of the mouth of the machine being bent at an angle and the .forming of thestaples being effected in this :bent por-tion, one half of the mouth of the machine forming the casing in which are combined the tools yfor forming the staples and the staple driver, the staple `former Vconsisting of a sliding member carrying two plates disposed at a `distance corresponding vto the width of a1 staple and having their free ends chamfered and the staple driver consisting of a sliding member carrying a jd-river plate of the width of the staple to be formed said tools being inserted and actu- -ated in the bent part, in order that the driver plate can be guided between t-lie'plates of the staple former and describe al movement relaprojects into the "said opening'and serves lto fsu no Y

form the staples, is forced back by the driver during itsy descent.

5.v Alhand stapler of the plier type in which staples are automatically detachedl and formed when the jaws of the pliers are closed, a casing pivotally mounted on the pivot of the jaw members and carrying staple forming and setting tools, onehalf of the mouth of the machine vforming said casing, said casing being mounted on pivotal axis of the `machine and carrying the wire reel on Vits ing and setting tools, one half of the mouthV of the machine forming said casing, said casing being mounted on pivotal aXis of the machine, and carrying the wire reel on its rear end,'whilst being supported against one limb .of the'niachine by va spring and being pivotally mounted in the other limb, the wire coming from Vthe reel passing to thel tools through a divided tube, having a member adapted to slide andv carrying a clamping lever which projects into theV tube and is engaged by a draw bar which is coupled with and actuated by the levers actuating the tools.

7. A hand stapler of the plier type in which staples are automatically detached and formed when the aws of the pliers are closed,

Va casing pivotally mounted on thel pivot of the j aw members and carrying stapleforming and setting tools, the ends of the mouth of the'machine being bent atan angle, one half of the mouth of the machine forming said casing, the staple former consisting of a vsliding member carrying two plates disposed at a distance corresponding to the width of a staple and having their free ends .chamfered and the staple driver consisting of a sliding member carrying-a driver plate of the width of the Astaple to be formed and these two tools being inserted and actuated in the bent part," in order that the driver plate can be guided between the plates of the staple former and describea movement relatively to the staple formers preceding them, the discharge opening of the chamber'housing the staple former being providedwith a recess in' which an abutment surface which projects into the said opening and serves to form the staples, is forced'bacl bythe driver during the descent, the wire coming fromthe reel passing to the tools through a divided tube,

`one member of which `is adapted toslide and carries a vclamping lever projecting into the tube and vengaged by a draw bar which is coupled with and actuated bythe levers actuating tlie tools. 4 'I 8. A hand stapler of the pliertype in which staples vare automatically detached and formed when the jaws ofthe pliers are closed, a casing pivotally mounted on the pivot of thej aw members and carrying stapley formingandsetting tools, one half of the mouth of the machine forming said casing, this end of the mouth ofthe machine `being bent at an angle, a lever actuating the staple former and engaged by a two-arined lever adapted to, on the descent of the lever, impart a positive rearward swing to a spring controlled lever feeding a portion of wire to the staple former.

9. A hand 'stapler of the plier type in which staples are .automatically detached and formed when the jaws of the pliers are closed, -a casing pivotally mounted on the pivot of the jaw members and carrying staple forming and setting tools, one half of the mouth Vof the machine forming the casing in which are combined the tools for forming the staples, this end of the mouth of the machine being bent at an angle, the wire coming from a reel on-tlie said casing passing to the staple forming and setting plungers Vthrough a divided tube having a slidable member carrying` a clamping lever which projects into the tube and is engaged by a draw bar, a lever actuating the staple former and engaged by a two-armed lever which, on the descent of the lever, impaits a positive rearward swing to a lspringcontrolled lever, said lever being spring actuated to draw forward the drawbar with the clamping-lever and the slidable tube in order to feed in the forward direction a portion of wire corresponding to the length of a staple.

lOQA hand stapler of the plier type in which-staples are automatically detached and formed when the jaws of the pliers aie closed, a ca siiig pivotally mounted on the pivot of the jaw members and carrying staple forniing and setting tools, the ends ofthe. mouth Vof the machine being bent at an angle, one

ha-lf of the mouth of the machine forming said casing, tlie'staple former consisting of a sliding member carrying two plates dis-v z osed at a distance corresponding vto the width of a staple and lia-ving their free ends chamfered and the staple driver consisting of a sliding member carrying a driver plate of the width of the staple to-be formed and these two tools being inserted and actuated y'in the bent part, in order that the driver plate canibe guided between-the platesof the staple former and describe a movement relatively to the staple formers preceding them, the-discharge opening of the chamber housing the staple former being provided 'with a recess in which an abutment surface which projects into the said opening and serves to orm the staples, is forced back by the driver during the descent, the wire coming from a reel on the rear end of the easing enclosing the tools and passing to the tools through a divided tube, one member of said tube being adapted to slide and carrying a clamping lever which projects into the tube and is engaged by a draw bar, the lever actuating the staple former being engaged by a two-armed lever which, on the descent of the lever imparts a positive rearward swing to a spring controlled lever adapted to draw forward the draw-bar with the clamping lever and the slidable tube in order to feed in the forward direction a portion of wire corresponding to the length of a staple.

1l. A hand stapler of the plier type in which staples are automatically detached and formed, when the j aws of the pliers are closed, a casing pivotally mounted on the pivot of the jaw members and carrying staple 0rming and setting members, one of the jaws being forked at its free end to form operating ca1ns,yand levers operated by the said cams for actuating the staple forming and setting members.

FRITZ MERZ. ADOLF FRITZ SCHAUSS. 

